linux-kernel - Re: [patch] Add basic sanity checks to the syscall execution patch

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Message-Id: <1220612231.4879.175.camel@pasglop>
Date:	Fri, 05 Sep 2008 20:57:11 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	pageexec@...email.hu
Cc:	Andi Kleen <andi@...stfloor.org>,
	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...x.de,
	hpa@...or.com
Subject: Re: [patch] Add basic sanity checks to the syscall execution patch


> and that'd be because at the same time they patch the syscall table (remember,
> they already have to go to length to get around the read-only pages), they
> can't also patch this 'protection'? sounds really plausible, right :).
> 
> [fixed hpa's address, .org bounces.]

Sure, they can :-)

It's just an idea I had on irc but I tend to agree that it wouldn't have
much effect in practice... regarding security, it will break some
existing rootkits ... until updated ones show up.

Cheers,
Ben.

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